$ git clone -n https://src.fedoraproject.org/rpms/marshalparser.git /var/lib/mock/f45-build-18034-507/root/chroot_tmpdir/scmroot/marshalparser
Cloning into '/var/lib/mock/f45-build-18034-507/root/chroot_tmpdir/scmroot/marshalparser'...
$ git fetch origin c4ef8fe43bb2b50820ec55a264b3f051831eb25d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/marshalparser
 * [new ref]         c4ef8fe43bb2b50820ec55a264b3f051831eb25d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c4ef8fe Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild